The Fieldpiece SNCV1 Non-Contact AC Voltage Detector features an analog feel and is a quick source to find out whether a line is hot or not. The closer the probe is to the voltage source, the louder and brighter the indicators become. This unit allows the user to detect AC voltages without contact and features a bright red LED light and buzzer for high visibility. With a 24VAC to 440VAC range, the SNCV1 offers technicians the ability to test thermostats and other HVACR parameters easily. The compact size allows for ease of transport and can clip to the user's shirt pocket when not actively in use.